doc: Update topotest doc to include iptables is needed

The nhrp tests skip tests that do not have iptables installed.
As such we have ended up with a situation where the nrhp test
is now failing locally for me because I have iptables installed
and if the CI system had iptables installed it would have detected
the problem as well.

Let's document that iptables is needed to do testing.

Signed-off-by: Donald Sharp <sharpd@nvidia.com>

diff --git a/doc/developer/topotests.rst b/doc/developer/topotests.rst
index 52c0361a025eb24ff77df77d6df3ea5e0315d0da..72de7b3bc9a49d03517900aa8d3f9eaeaf41e1d0 100644 (file)
--- a/doc/developer/topotests.rst
+++ b/doc/developer/topotests.rst
@@ -33,6 +33,7 @@ Installing Topotest Requirements
        net-tools \
        python3-pip \
        iputils-ping \
+       iptables \
        tshark \
        valgrind
    python3 -m pip install wheel